MANCHESTER — Senior Assistant Attorney General Jeffery Strelzin said he will seek the maximum sentence, 15 to 30 years in prison, for Tony Hebert, who pleaded guilty to manslaughter in the shooting death of Pablo Samniego on July 17, 2011.

Strelzin said he will seek a sentence of 15 to 30 years for Hebert, 29, at the sentencing scheduled for Sept. 16 in Hillsborough County Superior Court North. He said Hebert entered a “naked plea,” in that no sentencing offer was made to him before he pled Aug. 19.

Samniego was with a companion when a car pulled up to them in the area of Ferry and South Main streets at about 3 a.m. and, after a brief conversation, a man in the car fired a single shot, hitting Samniego, 21, in the head.

Hebert was arrested a couple of days after the shooting. He was indicted by the November Hillsborough County North grand jury on two felony charges of second-degree murder, which alleged he recklessly or knowingly caused Samniego’s death.

Hebert claimed he shot Samniego in self defense and was originally scheduled for trial in September 2012, but the trial had to be rescheduled when his privately hired attorney quit in August 2012 because he wasn’t paid.

The trial was rescheduled for August 2013. Hebert’s public defenders said Hebert felt threatened by Samniego’s aggressive behavior, but no witness said Samniego had a weapon.

Strelzin said he filed motions to block a stand-your-ground defense in the shooting, which occurred before passage of the law in New Hampshire.